B, because you can't get the square root of a negative number
Answer:
A
Step-by-step explanation:
In the figure shown, ABC is a right triangle with side lengths a, b, and c, and CD is an altitude to side AB. This altitude divides the triangle into two right triangles ADC and BDC. In these triangles,
So,

1. From the similarity
you have

2. From the similarity
you have

Hence, option A is true
B is the correct answer because 1 gallon of gas is 1.05 dollars, so 15 × 1.05 is 15.75...